More recent IUPAC recommendations now suggest the newer term " hydronium " be used in favor of the older accepted term " oxonium " to illustrate reaction mechanisms such as those defined in the Brønsted – Lowry and solvent system definitions more clearly, with the Arrhenius definition serving as a simple general outline of acid – base character.

The definition of ballroom dance also depends on the era: balls have featured popular dances of the day such as the Minuet, Quadrille, Polonaise, Polka, Mazurka, and others, which are now considered to be historical dances.

Unfortunately in the literature the definition is given in two variants: Despite the fact that Bernoulli defined B < sub > 1 </ sub > = 1 / 2 ( now known as " second Bernoulli numbers "), some authors set B < sub > 1 </ sub > = − 1 / 2 (" first Bernoulli numbers ").

Although the candela is now defined in terms of the second ( an SI base unit ) and the watt ( a derived SI unit ), the candela remains a base unit of the SI system, by definition.

* DIN 4512: A definition of film speed, now superseded by ISO 5800: 1987, ISO 6: 1993 and ISO 2240: 2003.

Since AIDS is now defined partially by the presence of HIV, Duesberg claims it is impossible by definition to offer evidence that AIDS doesn't require HIV.

In the Cartesian approach, the axioms are the axioms of algebra, and the equation expressing the Pythagorean theorem is then a definition of one of the terms in Euclid's axioms, which are now considered theorems.

Using now the power series definition from above we see that for real values of x

The Soviet ( now Russian ) definition is the time when the outer airlock hatch is open and the cosmonaut is in a vacuum.

One of the next milestones came in 1904, when Helge von Koch, extending ideas of Poincaré and dissatisfied with Weierstrass's abstract and analytic definition, gave a more geometric definition including hand drawn images of a similar function, which is now called the Koch curve ( see Figure 2 ).

The word factoid is now sometimes also used to mean a small piece of true but valueless or insignificant information, in contrast to the original definition.

Using the definition of free variables, we may now define a capture-avoiding substitution.

) When unqualified, M-theory now usually denotes this more general definition, rather than the one Witten originally advanced.

This led in 1923 to his formulation of the protonic definition of acids and bases, now known as Brønsted – Lowry acid-base theory, independently of the work by Johannes Nicolaus Brønsted.

In the vacuum cleaner analogy, one might have a vacuum cleaner definition with its ports, but now this definition would also include a full description of the machine's internal components and how they connect ( motors, switches, etc.

Then suppose definition B contains 32 instances of A ; C contains 32 instances of B ; D contains 32 instances of C ; and E contains 32 instances of D. The design now contains 5 definitions ( A through E ) and 128 instances.

The first attempt at mathematical rigour in the field of probability, championed by Pierre-Simon Laplace, is now known as the classical definition.

In September 2006, CBS Paramount Domestic Television ( now known as CBS Television Distribution, the current rights holders for the Star Trek television franchises ) began syndication of an enhanced version of Star Trek: The Original Series in high definition with new CGI visual effects.

Due to the complex history of evolving meanings and contexts, there is no clear or agreed upon definition of the Third World and the term is now less popular than it was during the 1970s and 1980s.

In order to address the inability to separate white phase modulation from flicker phase modulation using traditional Allan variance estimators an algorithmic filtering to reduce the bandwidth by n. This filtering provides a modification to the definition and estimators and is now identifies as a separate class of variance called modified Allan variance.

Before the definition of the genre of fantasy, many works that would now be classified as fantasy were termed " fairy tales ", including Tolkien's The Hobbit, George Orwell's Animal Farm, and L. Frank Baum's The Wonderful Wizard of Oz.

Because the definition of the meter is now based on a light wavelength, the international prototype meter is not quite as indispensable as it once was.

Prior to the launch of its HD feed in 2004, some sitcoms and drama series were presented in this format, but now reality, talk, and game shows ( American Idol being the lone exception, as it is presented in High Definition ) are only presented in the enhanced definition widescreen mode.

The most common definition of continental Europe excludes Cyprus, Iceland, Ireland, Malta and the United Kingdom and its dependencies.

The law primarily uses the notion of the consumer in relation to consumer protection laws, and the definition of consumer is often restricted to living persons ( i. e. not corporations or businesses ) and excludes commercial users.

Rummel explicitly excludes battle deaths in his definition.

This definition excludes any works that are the result of community creativity, for example Native American songs and stories ; current legislation does not recognize the uniqueness of indigenous cultural ' property ' and its ever-changing nature.

The " C-H " definition excludes compounds that are historically and practically considered to be organic.

This definition has been both praised and criticized, and remains disputed by some scientists since it excludes many objects of planetary mass based on where or what they orbit.

There is even disagreement about the term " ragtime " itself ; experts such as David Jasen and Trebor Tichenor choose to exclude ragtime songs from the definition but include novelty piano and stride piano ( a modern perspective ), while Edward A. Berlin includes ragtime songs and excludes the later styles ( which is closer to how ragtime was viewed originally ).

To be sure, as to not misinterpret Gutierrez ’ s definition of the term " preferential option ," he stresses, “ Preference implies the universality of God ’ s love, which excludes no one.

This stronger definition excludes every power of three ( 9, 27, 81, 243, ...), and many even integers from the base-2 Fermat pseudoprimes.

This definition excludes bismuth, the densest of approximately stable elements, because of its low toxicity.

The definition of " dhimmi " always excludes followers of the Bahá ' í Faith.

By way of an example, the narrower definition excludes storks and gulls, which can eat quite large fish, partly because these birds catch and kill prey entirely with their beaks, and similarly bird-eating skuas, fish-eating penguins, and vertebrate-eating kookaburras are excluded.

Such a definition arbitrarily excludes disciplines other than history, cultures other than Western, and forms of music other than " classical " (" art ", " serious ", " high culture ") or notated (" artificial ")-implying that the omitted disciplines, cultures, and musical styles / genres are somehow inferior.

A somewhat broader definition incorporating all musical humanities is still problematic, because it arbitrarily excludes the relevant ( natural ) sciences ( acoustics, psychology, physiology, neurosciences, information and computer sciences, empirical sociology and aesthetics ) as well as musical practice.

The most widely accepted definition is: “ a semi-enclosed coastal body of water, which has a free connection with the open sea, and within sea water is measurably diluted with freshwater derived from land drainage .” However, this definition excludes a number of coastal water bodies such as coastal lagoons and brackish seas.

( Euclid's original definition and some English dictionaries ' definition of rhombus excludes squares, but modern mathematicians prefer the inclusive definition.

This definition excludes the fistulas arising from the colon or the appendix.

Second, the definition of " any other weapon " in § 5845 ( a ) and ( e ) expressly excludes weapons with a rifled bore which this handgun / pistol had.

The “ any other weapon ” definition excludes weapons designed to be fired from the shoulder that are not capable of firing fixed ammunition or a pistol or revolver having a rifled bore.

The exact definition of exports includes and excludes specific " borderline " cases.

This definition excludes behaviour not related to environment, as well as behaviour related to the social and cultural environment, and genetics.